Global Patent Index - EP 0488823 A1

EP 0488823 A1 19920603 - Broadcasting of packets in an RF system.

Title (en)

Broadcasting of packets in an RF system.

Title (de)

Rundsenden von Paketen in einem HF-System.

Title (fr)

Diffusion de paquets dans un système HF.

Publication

EP 0488823 A1 19920603 (EN)

Application

EP 91311201 A 19911202

Priority

US 62098490 A 19901130

Abstract (en)

An RF communication system contains a control module (22) which communicates with a plurality of user modules (20) that are each connected to at least one user device (24). The system provides a means for packet communications in which traditional destination addressed packets (34) are communicated to the specified destination point (24) or user module (20) while also permitting information (52) intended for a plurality of user modules (20) to be broadcast simultaneously to all user modules (20) using a broadcast protocoal (46). The probability of each UM (20) receiving the broadcast packet (46) is enhanced by the transmission by the control module (22) of each broadcast packet (46) over at least several of its directional antennas (A1-A6) and preferably repeated over each antenna (A1-A6) a number of times (R). Packets of data (34) which are longer than a predetermined number of bytes (L) are broken into packet fragments (46). <IMAGE>

IPC 1-7

H04B 7/06; H04L 12/18; H04L 12/56

IPC 8 full level

H04H 20/00 (2008.01); H04B 7/26 (2006.01); H04L 12/18 (2006.01); H04L 12/28 (2006.01)

CPC (source: EP US)

H04L 12/189 (2013.01 - EP US); H04W 4/06 (2013.01 - EP US)

Citation (search report)

  • [Y] WO 8911126 A1 19891116 - MOTOROLA INC [US]
  • [A] INTERNATIONAL CONFERENCE ON COMMUNICATIONS '86 vol. 1, June 1986, TORONTO, CA pages 610 - 614; K. HUNG ET AL.: 'The Multi-Tone Multi-Access Protocol with Collision Detection for Multihop Packet Radio Networks with Multiple Directional Antennas Stations'
  • [A] COMPUTER COMMUNICATION REVIEW vol. 18, no. 4, August 1988, NEW YORK, N. Y., US pages 274 - 281; J. S. J. DAKA ET AL.: 'A High Performance Broadcast File Transfer Protocol'
  • [A] IEEE TRANSACTIONS ON COMMUNICATIONS vol. COM31, no. 3, March 1983, NEW YORK, N. Y., US pages 450 - 457; G. L. CHOUDHURY ET AL.: 'Diversity ALOHA - A Random Access Scheme for Satellite Communications'
  • [Y] IBM TECHNICAL DISCLOSURE BULLETIN vol. 33, no. 1B, June 1990, ARMONK, N. Y., US pages 439 - 440; 'Validation of the Single-Route Broadcast in Token Rings'
  • [A] * the whole document *

Designated contracting state (EPC)

DE FR GB IT SE

DOCDB simple family (publication)

EP 0488823 A1 19920603; EP 0488823 B1 19970312; AR 247460 A1 19941229; BR 9105220 A 19920721; DE 69125104 D1 19970417; DE 69125104 T2 19970911; JP 3315139 B2 20020819; JP H04302236 A 19921026; KR 960000604 B1 19960109; US 5321696 A 19940614

DOCDB simple family (application)

EP 91311201 A 19911202; AR 32128791 A 19911129; BR 9105220 A 19911202; DE 69125104 T 19911202; JP 33957491 A 19911130; KR 910021934 A 19911130; US 83293 A 19930105